get product quantity/qty in Magento

>> $_product is your product object. = Mage::getModel('catalog/product')->load('product_id');

    <?php
      $stock = Mage::getModel('cataloginventory/stock_item')->loadByProduct($_product);
      $qty = $stock->getQty();
      print_r( $stock->getData());      // To get other stock information.
    ?>